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HIGH PROTEIN FOOD FOR THOUGHT

Test and compare the protein content in various everyday foods

Suitable For

Grade 8

Difficulty

3

Time Required

 <2 Days

Supervision

Required

What’s it about?

Proteins have many different jobs within our bodies. The body mainly uses proteins for energy. Protein is also used as an ‘enzyme’, which starts reactions within the body such as metabolism, gene growth and repair. Meat and dairy products are foods which are rich in protein. In this science experiment, test for proteins in some everyday foods to see which have the highest content:

Topics covered

Protein, Enzyme, Lye, Indicator

What will I need?

  • METAL PAN
  • BOWL
  • GLASS JAR WITH LID
  • COPPER-SULPHATE SOLUTION
  • LYE [SODIUM HYDROXIDE]
  • 5x PLASTIC CUPS
  • SPOONS
  • MILK
  • EGG WHITE
  • BANANA
  • KIDNEY BEANS
  • MINCE MEAT
  • MAGIC MARKER
  • MEDICINE DROPPER

Procedure (Method)

Unfortunately, this section is only available in the e-book version of the project.

How does it work?

Unfortunately, this section is only available in the e-book version of the project.

In this science experiment, the food samples which have the highest content of ‘protein’ turns a brilliant violet colour when the copper-sulphate solution drops are added. We use a ‘chemical reaction’ that changes the colour of an ‘indicator’ (copper-sulphate solution) when there is a certain amount of ‘protein’ contained in a given volume of a food sample.

The fewer protein contained by a certain food, the less colour change is present when the copper-sulphate solution drops are added. The solid foods used in this experiment needed to be mixed with water and boiled into a paste to ‘break down’ the protein, to enable you to test for it easier.

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